{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941979964",
    "entityType": "Track",
    "nonce": "0xd69377d721efbbf158dfdc853ceb709a95a059090fedf8b671c70b9b48ae74b7",
    "signature": "0x1b26dc954db4a088cb1f8860e2980db09396bdeacfe7f777f3e3ada3107e5e3c380a2dc47f86aef308dac9a9e63da11104526d81debaf7aa23d5d2b468674ac91c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}